How long could I keep a car plate for the longest before putting it onto a car?

Hello, my daughter is turning 17 in the summer next year and she has just found a car plate that she would like to buy and put on her car next year: since her 17th birthday is around beginning of September, if i buy the plate now could i keep the plate till around then? (i am planning to buy her a car in around july next year)

Thank you very much guys!
How long could I keep a car plate for the longest before putting it onto a car?
you could always buy the car now register the plate to the car, then put a SORN on the car until she can use it, if you have somewhere to keep it off the road
How long could I keep a car plate for the longest before putting it onto a car?
retention is 12 months!
http://www.direct.gov.uk/en/Motoring/Buy鈥?/a>





What is the retention scheme?



If you would like to buy a vehicle number but have not yet purchased the vehicle to display the registration mark, you may retain the registration number on what is known as a 'Retention Certificate'.



The Retention Certificate enables you to retain the mark for up to twelve months prior to being assigned and costs only 拢25.00, incidentally you must pre-pay the 拢80.00 transfer fee in advance when retaining a mark. There are strict rules governing the use of retention certificates of which you must make yourself fully aware prior to using the service.